[ie/bilibili] Fix supporter-only video extraction (#11711)

Fix bug in 239f5f36fe
Closes #11702
Authored by: grqz, bashonly

Co-authored-by: bashonly <88596187+bashonly@users.noreply.github.com>

yt_dlp/extractor/bilibili.py

@@ -652,13 +652,6 @@ class BiliBiliIE(BilibiliBaseIE):
         else:
             video_data = initial_state['videoData']
 
-        if video_data.get('is_upower_exclusive'):
-            high_level = traverse_obj(initial_state, ('elecFullInfo', 'show_info', 'high_level', {dict})) or {}
-            raise ExtractorError(
-                'This is a supporter-only video: '
-                f'{join_nonempty("title", "sub_title", from_dict=high_level, delim="，")}. '
-                f'{self._login_hint()}', expected=True)
-
         video_id, title = video_data['bvid'], video_data.get('title')
 
         # Bilibili anthologies are similar to playlists but all videos share the same video ID as the anthology itself.
@@ -726,10 +719,20 @@ class BiliBiliIE(BilibiliBaseIE):
                 self._get_interactive_entries(video_id, cid, metainfo, headers=headers), **metainfo,
                 duration=traverse_obj(initial_state, ('videoData', 'duration', {int_or_none})),
                 __post_extractor=self.extract_comments(aid))
-        else:
+
         formats = self.extract_formats(play_info)
 
-            if not traverse_obj(play_info, ('dash')):
+        if video_data.get('is_upower_exclusive'):
+            high_level = traverse_obj(initial_state, ('elecFullInfo', 'show_info', 'high_level', {dict})) or {}
+            msg = f'{join_nonempty("title", "sub_title", from_dict=high_level, delim="，")}. {self._login_hint()}'
+            if not formats:
+                raise ExtractorError(f'This is a supporter-only video: {msg}', expected=True)
+            if '试看' in traverse_obj(play_info, ('accept_description', ..., {str})):
+                self.report_warning(
+                    f'This is a supporter-only video, only the preview will be extracted: {msg}',
+                    video_id=video_id)
+
+        if not traverse_obj(play_info, 'dash'):
             # we only have legacy formats and need additional work
             has_qn = lambda x: x in traverse_obj(formats, (..., 'quality'))
             for qn in traverse_obj(play_info, ('accept_quality', lambda _, v: not has_qn(v), {int})):
@@ -773,7 +776,7 @@ class BiliBiliIE(BilibiliBaseIE):
                 } for idx, fragment in enumerate(formats[0]['fragments'])],
                 'duration': float_or_none(play_info.get('timelength'), scale=1000),
             }
-            else:
+
         return {
             **metainfo,
             'formats': formats,